Disappointed that those caps aren't all going to discharge at the same time. I can see the risetime, it'll be on the order of 10 or 20 us. Then a couple hundred for full discharge, along the loaded transmission line.
The reason for the slow risetime is the ESL to each cap, plus the high impedance transmission line they're loading down.
It would be much faster if a close parallel-plate bus were used, but that would be more expensive. On the upside, it could be built from roofing flashing, also aluminum. No need for meaty connections once the current has spread out.
So, he'll get all the energy from that, but not as much peak power as you might expect.
No idea if he'll have an oscilloscope handy to measure this -- or be able to measure it at all, at scale (at full charge, that is). Same dynamics at 1V as at 10,000, of course, so it's easily confirmed separately.
Tim